FansubDB has updated confirming more series for April. Just looking at the TV station listings for some of them:

Yahari Ore no Seishun Love Come wa Machigatteiru and Photo Kano are both TBS series and late night Thursday/early Friday series(I think this was already known) so both are very likely TAN/AoD exclusives.

Devil Survivor 2, Shingeki no Kyojin, and Kakumieki Valvrave are all MBS series. Since the first two are hyped series, I imagine that Crunchyroll will have a difficult time getting them. The third one could be something that Viz does since they have a good relationship with Sunrise, and Viz is not shy about licensing some mecha anime although I imagine that both Viz and Funimation will be interested in Shingeki no Kyojin.

Pretty much, I get a bit sick of not having many adult characters now and then. Where are our fate/zeros, baccanos etc this season?

For Spring, so far you have Shingeki no Kyojin which is an action/horror anime done by a subsidiary of Production IG and you have Suisei no Gargantia which will be written by Gen Urobuchi(the writer of Fate/Zero and Puella Magi Madoka Magica) who specializes in grimdark stories. As far as the shows themselves, Fate/Zero was a smashing success largely in part because the Type-MOON fanbase is a very dedicated one and Baccano was a flop in Japan. Often times you have anime that come out that Western audiences and reviewers love but they tend not to sell well in Japan. One of the best selling anime from Spring will be Oreimo 2 because that caters to what the Japanese audience wants.